Meredith Monk is an American composer who includes many other art forms into her work.
Lots of music remains the same if you close your eyes. Is Monk's music the same? What is the same, what changes?
You can receive the musical story of a piece (its structure) by listening. If Monk's work incorporates many other elements, how does this affect its structure?
If structure can be outside of the sound of music, then what is the structure that is inside the sound of music?